About This

Solve Your Urgent Leak Problem First:9900 Clear Silicone Waterproof Sealant is the ideal solution for roof & wall cracks, gutter, siding, or RV/camper roof leaks. This UV-resistant caulk stops water infiltration immediately, minimizing the risk of costly structural damage from rain, snow, or freeze/thaw cycles
Long-Lasting Protection That Won't Fail:Unlike ordinary sealants, this high-temp silicone formula maintains superior flexibility and tear resistance through extreme thermal cycles (from -40°F to 350°F). It won't tear, shrink or lose adhesion, even after years of sun exposure and outdoor weathering
Works On All Your Surfaces:This multipurpose clear caulk bonds tightly to metal, aluminum, skylights, tile, stone, and most common building materials. Choose the clear invisible finish for discreet seals, or the white option for a clean, matching look on gutters and siding
Easy To Use For Everyone:The 9900 sealant extrudes smoothly for a bubble-free application, with no special tools required. It's paintable and easy to tool to a neat finish—perfect for DIYers fixing small cracks, or professional contractors working on larger projects
Trusted Quality For Peace Of Mind:This silicone sealant is made for long-term performance, with color integrity that won't yellow or fade over time. It's a reliable choice for both indoor (bathroom, kitchen gaps) and outdoor (roof, yard structures) waterproofing projects